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1. DE000019536289 - Verfahren zur Durchführung von kontinuierlichen Aufbereitungsprozessen mit gleichsinnig drehenden, dicht kämmenden Doppelschneckenextrudern

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Office Germany
Application Number 19536289
Application Date 29.09.1995
Publication Number 000019536289
Publication Date 03.04.1997
Publication Kind C2
IPC
B29C 47/4
B29B 7/48
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
7Mixing; Kneading
30continuous, with mechanical mixing or kneading devices
34with movable mixing or kneading devices
38rotary
46with more than one shaft
48with intermeshing devices, e.g. screws
CPC
B29B 7/007
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
7Mixing; Kneading
002Methods
007for continuous mixing
B29B 7/48
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
7Mixing; Kneading
30continuous, with mechanical mixing or kneading devices
34with movable mixing or kneading devices
38rotary
46with more than one shaft
48with intermeshing devices, e.g. screws
B29C 48/04
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
03characterised by the shape of the extruded material at extrusion
04Particle-shaped
B29C 48/405
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
395using screws surrounded by a cooperating barrel, e.g. single screw extruders
40using two or more parallel screws ; or at least two parallel non-intermeshing screws; , e.g. twin screw extruders
405Intermeshing co-rotating screws
Applicants KRUPP WERNER & PFLEIDERER GMBH
Inventors MUNZ RAINER DIPL ING
HERTER RAINER DIPL ING
BURKHARDT ULRICH DIPL PHYS
HAERING ERWIN DIPL ING
HEIDEMEYER PETER DR ING
Title
(DE) Verfahren zur Durchführung von kontinuierlichen Aufbereitungsprozessen mit gleichsinnig drehenden, dicht kämmenden Doppelschneckenextrudern
front page image
Abstract
(EN)

The invention concerns a method of carrying out continuous preparation processes on tightly meshing extruders rotating in the same sense, such as double screw and multi-shaft screw-type extruders. The extruder is operated at a screw speed of rotation of at least 800 rpm whilst the so-called "torque density" (Md/a<3>) which can be induced is increased by at least 11 Nm/cm<3> and the ratio between the screw outer diameter and screw inner diameter (Da/Di) is at least 1.5.
Also published as
AU1996068718
CA2231353
CN1198124
EP0852533
ES2127648
JP1999512666
KR1019990063835
MXPA/a/1998/002496
NO19981327
TR1998/00439
US6042260
WO/1997/012746
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